<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="isAll"/> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,index) in goodList" :key="index">
          <td><input type="checkbox" v-model="item.checked"></td>
          <td>{{item.name}}</td>
          <td>{{item.price}}</td>
          <td>
            <button @click="(item.num > 1)? item.num--:''">-</button>
            {{item.num}}
            <button @click="item.num++">+</button>
            </td>
          <td>{{item.num * item.price}}</td>
          <td><button @click="Del(index)">删除</button></td>
        </tr>
      </thead>
      <tbody>
        
      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">
            0
          </td>
        </tr>
      </tfoot>
    </table>
   
  </div>
</template>

<script>

export default {
  
  computed: {
     
     isAll:{
       get() {
         return this.goodList.every(item => item.checked)
       },
       set(value){
           this.goodList.forEach(item => item.checked = value)
       }
     }
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 18888,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 13888,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2888,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2888,
          num: 1,
          checked: false,
        },
      ],
      
    };
  },
  methods: {
    // reducefn(){
    //   if(this.goodList.num < 1) return alert('不能减了')
    //     this.goodList.num= this.goodList.num - 1
    // },
    // addfn() {
    //      this.goodList.num= this.goodList.num + 1
    // },
    Del(index){
       this.goodList.splice(index,1)
    },
    
  }
};
</script>

<style>
 
</style>